var city = [{"110100": {"name": "北京市", "locations": ["116.405285", "39.904989"]}},
    {
        "310100": {
            "name": "上海市",
            "locations": ["121.472644", "31.231706"]
        }
    }, {"320100": {"name": "南京市", "locations": ["118.767413", "32.041544"]}}, {
        "320200": {
            "name": "无锡市",
            "locations": ["120.301663", "31.574729"]
        }
    }, {"320300": {"name": "徐州市", "locations": ["117.184811", "34.261792"]}}, {
        "320400": {
            "name": "常州市",
            "locations": ["119.946973", "31.772752"]
        }
    }, {"320500": {"name": "苏州市", "locations": ["120.619585", "31.299379"]}},
    {"320700": {"name": "连云港市", "locations": ["119.178821", "34.600018"]}},
    {"320900": {"name": "盐城市", "locations": ["120.139998", "33.377631"]}}, {
        "321000": {
            "name": "扬州市",
            "locations": ["119.421003", "32.393159"]
        }
    }, {"440100": {"name": "广州市", "locations": ["113.280637", "23.125178"]}}, {
        "321200": {
            "name": "泰州市",
            "locations": ["119.915176", "32.484882"]
        }
    }]